Shuttle for electrical weft detectors



Aug. 23, 1932. R. G. TURNER SHUTTLE FOR ELECTRICAL WEFT DETECTORS Filed Dec. 28, 1929 Hm M M .vi @MON Z f TM @M Patented Aug. 23, 1932 q UNITED STATES RICHARD G. TURNER, oRwoRCRSTER, MASSACHUSETTS, AssIeNoRTo CRoMPToN aA KNCWLES Looivr WoRKs, or WORCESTER, MASSACHUSETTS, A 'CORPORATION or" MASSACHUSETTS v Y Y Y l SHUTTLE FOR ELECTRICAL WECET DETECTRS Appiieation fnea'necember 2s, i929. Serin No.V 417,245.

This invention relates to improvements in shuttles to be used in connection with elec-f trical. weft detectors and it is/the general object of the invention to provide a'shuttle' having a spindle and electric contacts sorelatedfand operated as to facilitate the placing of a full cop on the spindle.

Some shuttles are provided with spindles pivoted toone end of theshuttle' soV as to be moved out of the weft chamber4 of the shuttleV to permit removal of an empty cop and 1nsertion of a full one. These spindles vare sometimes provided with vscrew threads onv which the cop is turned sol as to hold the latter in position. The turning of the bobbin should take place without disturbing any of the electrical detector parts and it is a further object of my invention to provide-means for automatically withdrawing a detector el-` ement from the path of the bobbin or cop when the latter is rotated on the spindle.

Y Itis another object of my present invention to provide a cop having a slot therein through which may project partof a spring actuated detector element mounted on the spindle, said element being normally held in non-contacting position when weft is present but moving through thev slot whenl weft is absent. Markers or other, aligning'devices may be provided, one carried by the shuttle and one by the cop, so that the Vlatter may be placed so as to bring the Slot opposite the detector element. Y 'With these and other objects in view which will appear as the descriptionproceeds, my invention resides in the combination and ar-l rangement of parts hereinafter described and Set forth in the claims. f In the accompanying drawing, wherein a convenient embodiment of two forms of the invention are shown, Fig. l is a top plan view of the preferred form of shuttle madeA according to my present invention, the cop and mass of yarn supported by the spindle being shown partly in section,

Fig. 2 is a front elevation 0f the shuttle, parts being in section,

Figs. 3 and 4 are detailed vertical sections on lines 3 3 and 4-4, l, 4 being on an enlarged scale,

l showing the pivotedlcontact element Vmoved to fcontacting position because` of absence of we t,

Fig. 6 shows the aligning elements with the bobbin and spindle substantiallyin theposition shown in Fig. l, and.,- v L f Fig. 7 is a view similar to Fig. 3 but showingay modified vform of the invention.4 t Referring to Figs. l and 2, Ihaveshown a Shuttle S having'an eye E at one end for the delivery of the weftVV.V The opposite end of theshuttle is provided with a pivot pin l0 which supports the spindle 11 lhaving a bearing `portion l12 to cooperate with the pinlO. The spindle is tapered toward the eye end of the shuttle'and may be provided with several thin fin-like helical threads 13,'

the purpose of which is to hold the Acop 14 from endwisevmotion along the spindle when the shuttle is brought to a sudden stop atthe end of its flight. The matter thus construction and of itself forms no part of my present invention, the spindle normally being in the horizontal positiony shown` in full@ linesin Fig. 2 so as'to locate the mass of weft within the bobbin chamber C. i

YIn'carrying myinvention'into eiect'I provide thespindle with a transverse sloty and pivot as at 21a Contact element 22.'v The latteris provided with a yarn engaging projection 23' which is normally urged to assume the position shown in Fig. 5 by a light compression spring 2,4. The spring is received by a bore 25'in` the spindle as Vshown in Fig. 4 and is held in position byfmeans of a screw 26 threaded into the boreV and adj 'y stable tofvary the compressionv ofthe spring 24. y

Y `That end of the detector element 22 4which isadjacent pivot pin l() extends laterally as at 27 from which depends a vertical linger 2,8. lThe Shuttle is provided with an .electric contact plate .29 having an electrode (-30 adapted ,for electrical Contact` with the ZfingerfQS. A

second contactplat'el spaced fromthe other contact and in this instance above it, is, connected.. 'f eletficellyl to .the ,pivot .Pili .19

respectively, ofFig.l

Fig. 5 is av View similar to a portion of Figf f ar described is of common spindle and is located centrally with respect Y Brushes 32 and 33 are adapted for sliding `Contact with the plates 29v and 3l, respectively, as the shuttle is boxed. Y

The spindle may be provided with a marker of any approved form, inthis instance a pin 34 which Yprojects upwardly from the to the latter. An arrow' or other form of marker 3 5 may beplaced uponY the cop'rso'that when the latter is turned'to cause the arrow toV point toward the pin 34, the projection 23 will be opposite a longitudinal slot36 formed in ,the cop.

In the preferred formy of the invention the shuttle has secured to one of the vertical walls When applying a full cop to the shuttle the spindle will be moved upwardly around ,Y the pivot pin to assume the position shown in each other and for this reason .the external 7 dotted lines in Fig. 2. As the spindle is raised the arm 27 will engage the cam face 39'and moveV the detector element 22 around its ypivot 21 against the action of spring 24 until the projection V23 lies within the outline of the spindle. The parts are so proportioned that whenthe spindle is moved tol its kuppermost position the projection will be located within thejslot so that the'cop maybe slipped overthe spindleY and rotated :thereon withf out interfering with" the detector element. The cop isrotated in' order to embed the threads 13 into the interior walls of the cop, the latter being rotated untilthe mark V is in alignment with the mark 34 on thespindle.

The innermostlayers of yarn'on the cop extend across the slot 36 `so that when the spindle is moved downwardly to assume the position shown in full lines in Fig, 2 the projection 23 will be engaged by saidcoils of yarn to prevent theV contact element from movinginto engagement vwith the electrode 30. Duringr weaving, therefore, the brushes 32 'and 33 will `notbe in electricalcontact with plates, the pivot pin, the spindle which is metallic, the contact element22, and the elec- 'trode '303; This will close'the'external circuit 'referred to and will bring aboutachange in the operation ofthe loom, such for instance as an exchange of shuttles or stopping of the loom.

When the exhausted cop is to be removed from vthe shuttle the spindle will be raised yas previously described, the eifectof which will be to move the extension 23 within the spindle ,or out of the path of movement of the solid part of the cop so that the latter can be rotated on the spindle' to release the samefrom the threads 13 without Y' interfering with the contact element.

In the modified construction shown in Fig.

7'I provide the spindle with a pivoted contact Velement 40 having a downwardly vand outwardly projecting contact finger 41. The

external contact plate 42 on the shuttle-'is connected directly with a ,block 43 `which is really a consolidation of the cam block 38 and electrode 30 of the preferred form. The block 43 has a surface 44 inclined similarly to the finger 4l. The parts in the modification will be so located that when the spindleV spindle ismoved to copreceivingposition all portions of the contacting element will be moved outvof the pathrof the cop Vso that the latter may be rotated to effect embedding of the threads 13` therein. It willzfurther be .seen that when the spindle is restored to nor-v mal running position the Contact element'. is free to move into contacting position upon depletion of weft. It will also be seen in the modified form ofthe invention that the contacts' within the yarnv chamber'may beV provided with the inclined surface which moves the extension 23 into la safe position'when the spindle is `moved upwardly to receive a cop. L Having thus described myinvention it'will be seen that changes and modifications may be made therein. by thoseskilled in the art without departingrfrom the spirit and scope of the invention and I do not wish to ybeV limited to the details herein disclosed, but what Iclaimis: Y. l. In a shuttle having a spindle anda weft carrier thereon having a detector slot, a detector element operative to have a normal indicating movement by movement through the slot ywhen the spindle is in normal position and moved out of the slot and rendered inoperative to have indicating movement when the spindle is in'raised angular position with respect to the shuttle. f

2. In a shuttle having a pivoted spindle on which is normally mounted a cop supplied with weft and having a detector slot, a detector element movably mounted on the spindle and movable within the outline of the cop, and means eiective when the spindle is pivoted upwardly to move the element out of the slot and out of the outline of the cop whereby the latter can be rotated on the spindle. i

3. In a shuttle having a pivoted spindle on which is normally mounted a cop supplied with weft, the cop having a slot therein, a detector element movably mounted on the spindle and having a portionv movable into the slot of the cop at weft exhaustion when the spindle is in normal position, and means operated upon upward movement of the spindle to prevent the detector element from entering the slot of the cop.

4. In a shuttle having a pivoted spindle to support a slotted weft cop, a detector element movably mounted on the spindle. and free to move through the cop when the spindle is in normal position, and means to move I ithe detector element out of the slot in the cop when the spindle is pivoted upwardly to receive a fresh supply of weft.

5. In a shuttle having a pivoted spindle to support a weft cop, a detector element mounted on the spindle and having a portion normally capable of extending beyond the outlines of the spindle and across the outline of the cop when the spindle is in normal position, and means to move the element within the spindle where said element will be incapable of crossing the outline of the cop when the spindle is in raised angular position with respect to the shuttle.

6. In a shuttle having a pair of spaced electric contacts and a pivoted spindle to support a weft carrier, said spindle being electrically connected to one of the contacts, an electric detector element mounted on the spindle and normally urged toward the other contact, the element being prevented from movement toward said other contact by engagement of a portion of the detector with yarn, said portion to move into position capable of engagement with the carrier for the weft when engaging said other contact, and means to move the contact element to a position where the portion will be incapable of engagement with the carrier when the spindle is raised to receive a fresh weft carrier.

7. In a shuttle having a pair of spaced electric contacts and a pivoted spindle to supelement out of the path of movement of the weft carrier when the spindle is pivoted upwardly to receive a fresh supply of weft.

8. In ashuttle having a pair of spaced i electric contacts and a pivoted spindle to support a weft carrier, said spindle being electrically connected to one of the contacts, i

a contact element pivoted 0n thespindle and tending normally tomove into engagement with the other contact but refrainedfrom doing so by presence of weft, and having a part movable through the weft carrier at weft exhaustion to eliect engagement with said other contact, and a device `operative when the spindle is raised pivotally with respect to the shuttle to Vprevent movement of the contact element through the weft carrier.

9. In a shuttle having a pair of spaced electric contacts and a pivoted spindle to support a weft carrier, said'spindle being electrically connected to one of the contacts, a contact element pivoted on the spindle and tending normally to move into engagement with the other contact but refrained from doing so b presence of weft, and having a part mova le through the weft carrier' at weft exhaustion to effect engagement with said other contact, and a device operative when the spindle is raised pivotally with respect to the shuttle to prevent movement of the contact element through the weft carrier, said device including a iixed inclined surface on the shuttle to have engagement with the contact element. Y Y

In testimony whereof I have hereunto aiiixed my signature.

RICHARD G. TURNER.

port a weft carrier, said spindle being elec- Y trically connected to one of the contacts, an electric contact element movably mounted on the spindle and having a portion to lie within the path of movement of some part of the weft carrier when the latter is rotated on the spindle at indication of weft exhaustion, and means to move said contact 

